Sulphur Works roadside fumaroles

E862983

fumarole field hydrothermal area

Sulphur Works roadside fumaroles are a prominent, easily accessible hydrothermal area in Lassen Volcanic National Park where visitors can observe steaming vents, boiling mud, and strong sulfur odors along the park road.

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All labels observed (1)

Label	Occurrences
Sulphur Works roadside fumaroles canonical	1

Statements (42)

Predicate	Object
instanceOf	fumarole field ⓘ hydrothermal area ⓘ
access	paved park road ⓘ roadside pullouts ⓘ short walkways ⓘ
activity	geothermal sightseeing ⓘ photography ⓘ
associatedWith	Lassen Volcanic National Park scenic drive NERFINISHED ⓘ
category	fumaroles of the United States ⓘ geothermal tourist attraction in California ⓘ landforms of Shasta County, California ⓘ volcanic features of California ⓘ
country	United States of America ⓘ surface form: United States
emits	hydrogen sulfide ⓘ steam ⓘ sulfur gases ⓘ
geologicalSetting	active hydrothermal system ⓘ
hasFeature	boiling mud pots ⓘ colorful mineral-stained ground ⓘ hydrothermal runoff channels ⓘ rotten-egg smell ⓘ steaming vents ⓘ strong sulfur odor ⓘ sulfur deposits ⓘ
heatSource	Lassen volcanic center NERFINISHED ⓘ
interpretation	has interpretive signs explaining hydrothermal activity ⓘ
knownFor	close-up view of fumaroles ⓘ easy accessibility ⓘ year-round visibility when road is open ⓘ
locatedIn	California, United States ⓘ surface form: California Cascade Range ⓘ Lassen Volcanic National Park NERFINISHED ⓘ Shasta County, California NERFINISHED ⓘ
managedBy	National Park Service ⓘ
near	southwest entrance of Lassen Volcanic National Park ⓘ
partOf	Lassen Volcanic National Park hydrothermal system NERFINISHED ⓘ Lassen Volcanic National Park road corridor NERFINISHED ⓘ
relatedTo	Lassen Peak NERFINISHED ⓘ
safetyNote	ground near features can be thin and unstable ⓘ visitors must stay on designated paths ⓘ
touristAttraction	yes ⓘ
visibility	visible from park road ⓘ

How these facts were elicited

The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.

Instruction

You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10.

# Requirements
- If you don't know the subject at all, return an empty list.
- If the subject is not a named entity, return an empty list.
- Include at least one triple where predicate is "instanceOf".
- Do not get too wordy.
- Separate several objects into multiple triples with one object.

Input

Subject: Sulphur Works roadside fumaroles
Description of subject: Sulphur Works roadside fumaroles are a prominent, easily accessible hydrothermal area in Lassen Volcanic National Park where visitors can observe steaming vents, boiling mud, and strong sulfur odors along the park road.

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Lassen Volcanic National Park hydrothermal system → notableSite → Sulphur Works roadside fumaroles ⓘ